This is what we found on Wikipedia regarding the Scott Bradlee's Postmodern Jukebox:

Postmodern Jukebox (PMJ), also known as Scott Bradlee's Postmodern Jukebox, is a rotating musical collective founded by New York-based pianist Scott Bradlee in 2011. Postmodern Jukebox is known for reworking popular modern music into different vintage genres, especially early 20th century forms such as swing and jazz. They have toured North America, Europe, and Australia; often simultaneously due to the extensive discography and the numerous artists and performers involved in the project. Postmodern Jukebox has amassed over 2.2 billion YouTube views and 6.4 million YouTube subscribers since its introduction in 2011.

Each week, Postmodern Jukebox releases a new video on YouTube. Although originally most were filmed casually in Bradlee's apartment living room, sets became more elaborate over time. The band has covered songs by artists ranging from Lady Gaga and the Strokes to Katy Perry and the White Stripes. Since their beginnings as a small group of friends making music in a basement in Queens, New York, Postmodern Jukebox has gone on to feature 70 different performers and tour six continents.